Please do not continue with home remedies for your acne, as a lot of such remedies are completely unsubstantiated, and may often cause more harm than benefits.
The burn marks you’ve experienced are probably due to the acidic nature of vinegar, possibly having been left on your skin for too long. This will recover with time, and leave behind some post inflammatory hyperpigmentation (PIH).
PIH is probably also what you described to be the mole-like spots left behind by acne.
Please consult a dermatologist or doctor with an interest in skin, who will be able to help manage both your burn marks and acne.
